Paula Simons: Stephen Mandel looks for Alberta's political sweet spot

“Oy,” says Stephen Mandel, easing himself onto the edge of a riser. 
“I was playing tennis yesterday and I think I pulled a tushy muscle.” 
It is a vintage Mandel moment. The naughty boy charm. The casual but careful reminder that while he may be 72, he’s still more than active. And the signature Yiddish slang. (In case you needed a translation, your tush, or your tuches, is what you’re sitting on. And I don’t mean your chair.) 
Yes, it&rs